PUR Faucet Mount Replacement Water Filter - Basic 1 Pack RF-3375-1: * Provides up to 100 gallons of crystal clean water * Enjoy 2-3 months of clean, great-tasting drinking water straight from your own faucet * Easy-to-change, and fits any PUR Faucet Filter * Pharmaceutical reduction is not certified by NSF/ANSI or state standard. Based on manufacturer testing for average reduction in trace levels of 12 pharmaceuticals. Pharmaceuticals may not be in all users’ water.